A Siren on a key ring in an open palm, a police car’s lights glowing down the street behind it

Summary: Police have a simple piece of advice for anyone who walks to a car, comes home after dark or lives alone: carry something loud. A pull-pin alarm the size of a lighter is how hundreds of thousands of people are taking it…

Ask a police officer what to carry for your personal safety and you might expect a lecture about pepper spray or self-defense classes.

Instead, many of them say the same three words: carry something loud.

Purse snatchers, car-lot thieves and the person trying door handles at night all want the same thing: a target who is alone and quiet. Noise and light bring witnesses, and witnesses are exactly what they want to avoid.

That’s why a tiny $20 alarm that clips onto a key ring has now been bought by more than 800,000 people, and why so many of them buy a second one for someone they worry about.

What Is It?

The Original Defense Siren on a key ring with its pull ring at the top

Meet the Original Defense Siren. It’s a personal safety alarm about the size of a cigarette lighter that rides on your keys, your purse strap, your jacket zipper or your backpack.

It does one thing, and it does it instantly: pull the ring and it lets out a 130-decibel siren, roughly as loud as a jet engine, while a bright LED strobe flashes. Push the pin back in and it stops.

There is no app to download, no phone to unlock, no number to dial and no monthly bill. It runs for about a year on two coin batteries that come already installed.

Why Police Recommend Carrying One

The places most of us go every day are the places these crimes happen. The Bureau of Justice Statistics lists parking lots and garages among the most common places for violent crime outside the home, and older adults and women walking alone are frequent targets for grab-and-run theft because they’re assumed to be easy to catch off guard.

A 130 dB siren and a flashing strobe turn a quiet parking lot into the loudest, brightest place on the block in under a second. Most people never have to use their Siren, but they carry it because they know they can.

130 Decibels, Up to 1,000 Feet – loud enough to be heard down the block and across a parking lot.

Bright LED Strobe – flashes so people can find you, even after dark.

One Pull, No Phone Needed – no app, no screen, no dialing. Works even if you drop it.

Where People Keep Theirs

Keys with a black Siren in hand at a front door at dusk, a police car parked down the street

Because it’s smaller than a car key fob, people clip it to whatever they already carry. These are the moments they tell us they’re glad it’s there:

1.

Walking to the car after work, after church on a Wednesday night, or across the store lot with an armful of bags.

2.

Coming home after dark, fumbling for the house key on the porch with the street empty behind you.

3.

Home alone, on the nightstand or by the door. If someone tries the door, one pull lights up the house and wakes the neighbors.

4.

On a teen’s or college student’s backpack, for the walk across campus or home from practice.

5.

On the morning walk or jog, clipped at the hip, for anyone who heads out before sunrise.

A police officer handing a pink Siren to a smiling woman at a community safety talk

And If You Fall, Help Can Hear You

The same siren works for the emergency nobody plans for. According to the CDC, about one in four Americans over 65 falls every year, and most falls don’t happen in front of family. On the ground, your phone may be out of reach and a shout for help only carries so far.

The Siren is heard up to 1,000 feet away. One pull and every neighbor, jogger and store clerk within a city block knows exactly where you are.

Start Using The Siren In 3 Easy Steps:

1.

Clip it where your hand can always find it: your key ring, purse strap, jacket zipper or backpack. The carabiner is included.

2.

If you feel unsafe, fall, or need attention fast, pull the ring. The siren and the strobe start instantly, even if you drop it.

3.

Push the pin back in to silence it. That’s it. Nothing to charge and nothing to set up.

An older woman heading out the door with the Siren clipped to her purse strap

Clips On Anywhere – key ring, purse, jacket zipper, backpack or walker. Carabiner included.

About a Year on One Set of Batteries – two CR2032 coin cells come installed and are easy to replace.

Water Resistant – rain, snow and sweat are no problem.

Some Questions We’ve Had

Does it call 911 or a monitoring center?
No, and that’s the point. There is no subscription and nothing to fail when your phone is dead or out of reach. It gets help from the people nearby, right now, by making it impossible to ignore you.

Is it a weapon?
No. It’s an alarm, so there’s nothing to aim and nothing that can be turned against you. Many people carry it in places pepper spray isn’t allowed.

Is it hard to pull?
No. The ring is large enough to hook a finger or thumb through, and a firm tug is all it takes. It’s designed to work for hands with arthritis.

How do I turn it off?
Push the pin back into the top. The siren and the light stop immediately.

How long does shipping take?
Orders ship from the USA, usually within 1–2 business days.

What do I get in a package?
1 x Original Defense Siren with batteries installed
1 x Carabiner clip
1 x Key ring

What Do Others Think?

One for Everyone You Worry About

A daughter showing her mother how to use the Siren

If you have a daughter who walks to her car late, a kid heading off to college, or a parent who still lives on their own, you know the feeling when the phone rings at an odd hour.

That’s why so many Siren orders are for two or more. One for your keys, one for theirs. It doesn’t say “I think something bad will happen.” It says “I’ve got you.”

How Much Does It Cost?

Monitored alert pendants typically cost $25 to $50 every single month, plus equipment and activation fees, and many only work inside the house.

At the moment of writing, the Original Defense Siren is on a Buy 1, Get 1 Free offer: two Sirens for just $39.95, about $20 each. One payment, no contract and no monthly fee.

And you don’t have to take our word for it. Every order comes with 30-day returns, so you can try it and decide for yourself.

Click here to get the Buy 1, Get 1 Free offer (if it’s still available) >>

Why Is It Discounted Right Now?

With more than 800,000 sold, the company would rather put a second Siren in the hands of someone you love than spend that money on TV ads. Buy one, and the second is free.

The catch is that this offer is limited to current stock, and the most popular colors tend to sell out first.

Click here to get the Buy 1, Get 1 Free offer (if it’s still available) >>

Should I Buy Now Or Wait?

Nobody plans on the stranger in the parking lot. Nobody plans to fall. The whole point of the Siren is that it’s already on your keys when you need it.

Police can’t be everywhere. Something loud on your keys can.

Where Can I Get A Real Original Defense Siren?

The Original Defense Siren in black, white, magenta and mint

Beware of cheap look-alikes. Many copies are quieter, use flimsy pull pins or die within weeks. Make sure you get the original!

Get your Original Defense Siren from their official website here.

As of * – The Original Defense Siren is available as a Buy 1, Get 1 Free offer while current stock lasts. Choose from black, white, magenta or mint.

NOTE: This product is NOT sold in retail stores.

Customer Ratings

Average across 800,000+ customers

4.7 Yellow rating stars Excellent
Quality
Easy To Use
Loudness
Value